1. If you are indeed unsure of the answer during your thesis defense, you can directly respond with "I don't know." This avoids providing an incorrect or irrelevant answer that may confuse the assessors.
2. If you didn't hear the question clearly, you can say "Pardon?" or "May I ask you to repeat the question?" to request clarification.
3. Remember, during the defense, it is crucial not to get too nervous when faced with questions you haven't anticipated.
